WASHINGTON (AP) - A former population control administrator in China gave grim congressional testimony Wednesday about Chinese government tactics for dealing with unauthorized pregnancies: nighttime raids, forced abortions, destruction of offending women's houses.

Gao Xiao Duan said her office paid informants to report on unauthorized pregnancies of neighbors, relatives and friends. She provided extensive details to the House International Relations human rights subcommittee on how China's "one child per couple" system functions.

The hearing was the second called in less than a week by Rep. Chris Smith, R-N.J., for testimony on alleged rights violations in China. Former dissident Harry Wu testified Thursday on prison labor abuses, including forced organ removal.

House Republicans are stepping up pressure on China before President Clinton's visit to Beijing starting June 25.

Both some Democrats and Republicans, along with Chinese dissidents, have urged Clinton to cancel his visit, saying it would give legitimacy to what they call a repressive government. Other lawmakers say the trip should be canceled because of alleged illegal campaign contributions from China and investigations of the possible transfer of U.S. missile technology to China. But the president, in a speech planned Thursday, will contend it is unwise to isolate China.

A CBS News poll, released Wednesday, indicated that 59 percent of Americans believe Clinton should make the trip to China. Thirty-two percent said he should not go and nine percent did not know or didn't answer. Fifty percent said trade with China was good for the U.S. economy, 23 percent said it was bad and 14 percent said it had no effect. Thirteen percent didn't answer or didn't know.

The poll, based on telephone interviews Sunday through Tuesday with a random sample of 1,126 adults, had a margin of error of plus or minus three percentage points.

The House has passed eight bills that ban Chinese products made allegedly by slave or convict labor and bar U.S. travel by Chinese officials who engage in religious persecution or forced abortions. Senate action is pending.

Still ahead is the annual battle between Congress and the Clinton administration over extending so-called most favored nation trade status to China. Although resolutions have been introduced to deny the extension, it is expected to pass as usual.

At the human rights panel, a videotape of Gao and the building where she ran a birth control office for 14 years included footage of an aborted fetus, a detention cell with bars, an operating room and a computer records center.

"I did so many brutal things. . . . All those . . . years I was a monster in the daytime, injuring others by carrying out the Chinese Communist authorities' barbaric planned birth policy," Gao said in Chinese translated by an interpreter. "But in the evening I enjoyed my life with my children. I could not live such a dual life anymore."

She said she quit her job in Fujian province's Yongwe township this year, fled China and arrived in the United States in April.

"There is a longstanding concern by our government" about Chinese population policy, White House press secretary Mike McCurry said, and the subject has been raised with China.

"These are obviously practices that we consider abhorrent," McCurry said. "That will be part of the president's upcoming trip."

Clinton, criticized for going to China, will speak Thursday on why he is making the trip.

"I think that he believes that a fair amount of politics has been injected into the debate about China," McCurry said, "and I think he wants to separate politics from questions of policy."

McCurry said China insists its official policy prohibits the use of force to compel people to submit to abortion and sterilization. But he said: "Evidence that comes forward suggests there is poor supervision of local officials, who are sometimes under very intense pressure to meet family planning targets."

Smith said Gao's testimony "included depravity of the People's Republic of China program that not even the harshest critics of the program ever suspected. Women are rounded up, held in `population jail cells' and forced and coerced to submit to the killing of their children."

The Chinese government allows most urban couples to have only one child and strongly discourages rural families from having more than two.